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X. Liang, B. Hou, J. Pombo, Y. Zhang, W. Zhou, Q. Zhang, H. Ban, "Study on a Hybrid Finite Element-Ray Method for Predicting Broadband Interior Structure-Borne Noise", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 19.7, 2026, doi:10.4203/ccc.15.19.7

Keywords: hybrid acoustic modeling, structure-borne noise, railway induced noise and vibration, ray acoustics, high-frequency noise, finite element modeling (FEM).

Abstract

Interior structure-borne noise directly affects human comfort. Its accurate prediction is key in noise-control engineering. Traditional single numerical methods struggle to balance accuracy and efficiency across the entire frequency range. To address this problem, a broadband prediction method is proposed in this paper, which fuses the low-frequency finite element method with the high-frequency ray acoustics method. A two-dimensional simulation example is constructed for verification. The results show that the ray acoustics method exhibits low sensitivity to mesh size. Its computational characteristics are primarily determined by the number of released rays. In the 400 to 1000 Hz frequency band, the spectral trends of the sound pressure level calculated by the ray acoustics method and the finite element method are generally similar. The mean absolute error of their one-third-octave-band sound pressure level is only 1.14 dB. Under equivalent computational efficiency, the prediction error of the ray acoustics is 1.58 dB lower than that of the finite element method with a coarse mesh, demonstrating superior performance in the high-frequency band.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 15 PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 19.7 Study on a Hybrid Finite Element-Ray Method for Predicting Broadband Interior Structure-Borne Noise X. Liang¹, B. Hou¹, J. Pombo², Y. Zhang¹, W. Zhou¹, Q. Zhang¹ and H. Ban¹ ¹School of Civil Engineering, Beijing Jiaotong University, China ²Institute of Railway Research, University of Huddersfield, United Kingdom doi:10.4203/ccc.15.19.7 Full Bibliographic Reference for this paper X. Liang, B. Hou, J. Pombo, Y. Zhang, W. Zhou, Q. Zhang, H. Ban, "Study on a Hybrid Finite Element-Ray Method for Predicting Broadband Interior Structure-Borne Noise", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 19.7, 2026, doi:10.4203/ccc.15.19.7 Keywords: hybrid acoustic modeling, structure-borne noise, railway induced noise and vibration, ray acoustics, high-frequency noise, finite element modeling (FEM). Abstract Interior structure-borne noise directly affects human comfort. Its accurate prediction is key in noise-control engineering. Traditional single numerical methods struggle to balance accuracy and efficiency across the entire frequency range. To address this problem, a broadband prediction method is proposed in this paper, which fuses the low-frequency finite element method with the high-frequency ray acoustics method. A two-dimensional simulation example is constructed for verification. The results show that the ray acoustics method exhibits low sensitivity to mesh size. Its computational characteristics are primarily determined by the number of released rays. In the 400 to 1000 Hz frequency band, the spectral trends of the sound pressure level calculated by the ray acoustics method and the finite element method are generally similar. The mean absolute error of their one-third-octave-band sound pressure level is only 1.14 dB. Under equivalent computational efficiency, the prediction error of the ray acoustics is 1.58 dB lower than that of the finite element method with a coarse mesh, demonstrating superior performance in the high-frequency band. download the full-text of this paper (PDF, 12 pages, 695 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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